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Tuning of the Hanle effect from EIT to EIA using spatially separated probe and control beams

Bhattarai, M and Bharti, V and Natarajan, V (2018) Tuning of the Hanle effect from EIT to EIA using spatially separated probe and control beams. In: Scientific Reports, 8 (1).

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Official URL: https://doi.org/10.1038/s41598-018-25832-8


We demonstrate a technique for continuous tuning of the Hanle effect from electromagnetically induced transparency (EIT) to electromagnetically induced absorption (EIA) by changing the polarization ellipticity of a control beam. In contrast to previous work in this field, we use spatially separated probe and control beams. The experiments are done using magnetic sublevels of the F g = 4 → F e = 5 closed hyperfine transition in the 852 nm D2 line of 133Cs. The atoms are contained in a room temperature vapor cell with anti-relaxation (paraffin) coating on the walls. The paraffin coating is necessary for the atomic coherence to be transported between the beams. The experimental results are supported by a density-matrix analysis of the system, which also explains the observed amplitude and zero-crossing of the resonances. Such continuous tuning of the sign of a resonance has important applications in quantum memory and other precision measurements.

Item Type: Journal Article
Publication: Scientific Reports
Publisher: Nature Publishing Group
Additional Information: The copyright for this article belongs to the Authors.
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 23 Aug 2022 10:14
Last Modified: 23 Aug 2022 10:14
URI: https://eprints.iisc.ac.in/id/eprint/76206

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